Fireproof shutter



(No Model.)

W. R. KINNEAR. PIREPROOF SHUTTER.

Patented Sept. 2,4, 1895.

ANDREW B GRMMM,PHUYOUTHQWASHINGYCN DC rra a'rnnr einen.

I/VILLIAM R. KINNEAR, OF COLUMBUS, OHIO.

FIRPROOF SHUTTQER.

SPECIFICATION forming part of Letters Patent No. 546,857, datedSeptember 24, 1895.

Application filed December '7, 1894. Serial No. 531,119. (No model.)

.To a/ZZ whom it may coi/acera.-

Be it known that I, WILLIAM R. KINNEAR, a citizen of the United States,residing at Oolumbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Fireproof Shutters; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The object of my invention is to provide improvements in theconstruction of reproof shutters, doors, and the like. It is desirablethat such shutters, doors, and the like be as light as possible, and toattain this it is essential to employ more or less wood 0r other lightmaterial in the construction of the frames. This frame is protected fromcombustion by a sheathing of sheet metal, and to prevent the opening ofthe seams from warping of the metal, due to the contraction andexpansion thereof, and especially when exposed to violent heat, is thechief object of my present invention. This feature, as well as theremaining features of my invention, are illustrated in the accompanyingdrawings, in which-- Figure 1 illustrates in elevation a part of ashutter, a portion of the panel beingbroken away to illustrate theinterior construction. Fig. 2 is a sectional view taken on line @cofFig. l. Fig. 3 is a sectional view on the line y y of Fig. 1. Fig. 4illustrates a sectional view on a larger scale to better illustrate thedetails of the chief feature of my improvements.

The character 1 designates the Wooden frame, which is of the usualrectangular form and is made with a saw kerf or groove 2 at its innerside. In this groove I place a strip of metal 3, preferably hard. Asheathing of metal 4 covers the frame and is secured thereto by nailsdriven into the wood and against the metal strip, so that their pointsshall be turned aside and thereby clinched.

The cross-pieces 8, extending between the vertical sides of theshutter-frame, are preferably composed of two pieces of wood with ametal clinching-strip 3 laid between them. In order to protect thesecross-pieces against charrin g or combustion, they are covered with aprotective sheathing of metal, as shown. The panels 5, of proper contourand orna mented with any suitable design, are next secured to the frame,their edges being held by nails 6, driven into the wood and against themetal strip 3 and clinched, as shown.

In order to render the shutters or doors more perfectly fireproof, Ipropose to ll the space between the panels with asbestos or other poorconductor of heat or with some non-combustible material. This materialmay be retained in position by a number of zigzaged strips of metal 9,laid vertically within the space, as shown. To prevent the panels frombulging when exposed to heat, I employ a number of rivets IO, securedbetween them at proper intervals. These rivets also assist in retainingthe asbestos in position. The metal nail-clinching strip is alsoemployed at the miter-joints of the frame, as indicated at the cornersof the frame.

It will be seen that the present improve ments secure lightness,durability, and tireproofness without any sacrilice of comeliness intheappearance of shutters, doors, and similar structures.

What I claim, and desire to secure by Letters Patent, is-

I. In fire-proof shutters and the like, a frame, panels secured to saidframe, a tireproof packing in the space between said panels, withdevices substantially as described for retaining said packing inposition.

2. In fire-proof shutters and the like, a frame, panels secured to saidframe, a tlreproof packing in the space between said panels, devices forretaining said packing in position, and rivets uniting the panels,substantially as shown.

3. A body of wood or similar material, a hard strip placed within saidmaterial, a sheathing secured to said material by a nail having its endclinched or turned by said hard stri hp In fireproof shutters and thelike, a frame of wood or other material having embedded therein a nailclinching strip, a protective sheathing covering said frame, and panelssecured to said frame by nails clinched by the clinching strip,substantially as shown and described.

In testimony whereof I afiiX my signature in presence of two witnesses.

WILLIAM R. KINNEAR. Witnesses:

GEORGE. M. FNoKEL, CHARLES FRANK.

